Telehandlers are heavy duty work machines made particularly to operate in rough terrain. This however, does not mean they could be driven without regard on rough terrain. These machines have a much bigger risk of load loss or tipping over when they are traveling on slopes.
If you do have to travel on a slope, make certain that you proceed slowly and carefully while keeping the load low. Before getting on the slope, downshift to 4WD and a lower gear. Using the engine brake would really help to control the telehandler's speed. Try to avoid turning on a slope if possible. If you must make the turn, use extreme caution and take it as wide as possible.
Under any circumstances, avoid driving across extremely steep slopes. Ascend and descend slopes with the telehandler's heavy end pointing up the incline. Even when the forks have no cargo, the counterweighted rear of the equipment is fairly heavy; thus, it can be required to drive in reverse up slopes. Once the telehandler is carrying a cargo, the front of the unit becomes the heavy end, and you could back the equipment down the slopes.
Operator training is extremely vital on a mixed jobsite. Rear pivot machines would usually operate on the same jobsite of coordinated steering equipment, where everybody is permitted to use all of the equipment. In this case, an individual who is used to using a coordinated steer equipment can jump onto a rear-pivot equipment. A really significant difference between how these two units work has much to do with what part of the equipment extends outside of the turning radius.